Quest Resource (NASDAQ:QRHC – Get Free Report) and CDT Environmental Technology Investment (NASDAQ:CDTG – Get Free Report) are both small-cap business services companies, but which is the better investment? Get Quest Resource alerts:Analyst RecommendationsThis is a summary of recent ratings and recommmendations for Quest Resource and CDT Environmental Technology Investment, as reported by MarketBeat. Given Quest Resource’s stronger consensus rating and higher probable upside, equities research analysts plainly believe Quest Resource is more favorable than CDT Environmental Technology Investment. ProfitabilityNet Margins Return on Equity Return on Assets Quest Resource -9.34% -13.12% -3.98% CDT Environmental Technology Investment N/A N/A N/AVolatility and RiskThis table compares Quest Resource and CDT Environmental Technology Investment’s net margins, return on equity and return on assets. Gross Revenue Price/Sales Ratio Net Income Earnings Per Share Price/Earnings Ratio Quest Resource $270.71 million 0.12 -$15.06 million ($1.21) -1.29 CDT Environmental Technology Investment $29.76 million 0.28 $1.45 million N/A N/ACDT Environmental Technology Investment has lower revenue, but higher earnings than Quest Resource.